Once every 40 years, the moon takes on an unusual crescent moon shape which indicates that the ritual must be performed once again.

The most powerful Barons, Kings, Queens and leaders of the medieval world gather in a giant palace to celebrate their unity, before the gathering turns into a violent sacrificial ritual that is said to be necessary to maintain balance in the world.

What or whom is sacrificed remains a mystery to this day... only those who participate know of it and are not allowed to speak of it. The information is secretly passed down from generation to generation.

Once... centuries ago, the ritual was dismissed due to disbelief and a giant flying beastly entity appeared from the sky and killed more than half of the worlds population. The moon turned brightly red for a month as a symbol that was never to be forgotten.